I have hundreds and hundreds of them, built out of steel, don't use tin. If you are ever in Colorado I would donate enough to do your wheels. I understand that the ones I have were originally intended to be used as some kind of shim in more modern cars.

Nobody drives their T at 20mph anymore - do you ? Common sense would dictate that if the spokes are loose enough to require shims, there is a problem or cause for them to have become loose - loose wheel = unsafe driving conditions.

We're talking black era here. For a 1926 Ford you can buy all new spokes for five wheels for well under $400. Rewooding those wheels takes some work, but it ain't brain surgery. Most people can manage it.

Sure, when a wheel fails it may be no big deal. On the other hand it just may be a very big deal. Why risk it by riding on cobbled-up junk?

Good for you Keith, I am weary of the grannys that make this such an issue...I have driven so many *loose* wheels without problem...eventually tightened them with shims. Got tired of the clacking noise.

I'll side with Keith and Dave, to some extent. Just because spokes have shrunk a bit and are slightly loose, that's not a good reason to replace them. They can be shrunk a bit in length without being unsound (meaning soft, rotten, or punky). If the wood is still good and hard, those wheels are candidates for shimming.